Cylinder printing-press



PATENIBD NOV. 16, 18521 J. G. NORTHRUP.

CYLINDER PRINTING PRESS.

UNITED STATES PATENT OFFICE.

JOEL G. NORTHRUP, OF SYRAOUSE NIMV YORK.

CYLINDER PRINTING-PRESS.

Specification of Letters Patent No. 9,408, dated November 16, 1852.

To all whom it may concern Be it known that I, J OEL G. NORTHRUP, of Syracuse, Onondaga county, and State of New York, have invented several new and useful Improvements in Cylinder Printing- Presses; and I do hereby declare the following to be a clear and exact description of the same, reference being had to the annexed drawing, making a part of this specification, in which Figure l is a longitudinal section containing and showing all the points which I claim as new.

I provide a bed (a) placed upon girts or tracks (Z2) with friction rollers between, in the usual manner. At one side of the bed and press, there is atooth rack (f) made fast to the bed which gives motion to the cylinder, to the sheet flier and to the inking works. The cylinder (g) (in red line) is of the ordinary construction, except that it has the tooth wheel (it) upon its shaft which gears directly into the rack by which it is driven. This wheel runs loose upon its shaft, and is provided with a pawl whiclrworks into a clutch made fast to the shaft of the cylinder. This clutch is an inside clutch by which the loose wheel makes fast to and carries the cylinder with it when the bed is driven in the direction in which the impression is given. When the bed returns the reverse action of the loose wheel (7L) detaches the pawl (79) from the clutch and leaves the cylinder at rest until it is brought into clutch again by the next reverse of motion. The cylinder is held at rest by the action of the bar (0) the lower end of which works upon a pivot fastened to the frame, and the upper end, made with a projection from its side, is kept pressed, by the action of the spring (a) to the periphery of a circle forming a portion of the blank plate of which the inside clutch is a part; until, at the moment of rest of the cylinder, the projection drops into a recess and prevents any further motion of the cylinder, until the bar is detached from the recess by the action of a stud (y) projecting from the rack which comes in contact with it (the bar) and presses it out of the recess, at the last extreme of the beds return, in which position the machine is represented. The

cylinder has the usual grippers for holding the sheet which are worked by gearing in the common Way.

I further provide in connection with the feed board a registering apparatus which, being of common construction and not new, I have not represented in the drawings.

The apparatus for flying the sheet, not

being new need not be described. The inking apparatus is of ordinary construction, having its fountain (9) its vibrating roller (r) its form rollers (8), its feeding roller (If), its loose distributer (p), all of which are worked in the common way.

I have deemed further description of these last named parts unnecessary, there being nothing but well known machinery in them; and their relative posit-ions and combination are plain to be understood. All the above parts are upon the main frame which is so constructed as to receive and hold them properly in place-each of the parts having the usual arrangements for adjustment and regulation.

The method of driving the bed and, with it, the other parts, is as follows: A connecting rod (a) is attached to the underside of the bed by a proper joint and its other or opposite end is connected either to a crank or to a vertical oscillating shaft or pendulum (o) worked by a crank d) made fast to the end of the shaft (to). Vhen a pendulum is used, a connecting rod (w) connects it with the crank (cl) which is shorter than the crank would require to be were no pendulum used. The crank may be driven by any well known arrangement or application of power. The pendulum and crank, with their connecting rod, are placed upon a separate frame. hen no pendulum is used, the crank may be either appended to the frame of the press, or placed upon a separate frame, as when a pendulum is used.

Opcmt0m-Power being applied to the shaft (00), it revolves with the crank (CZ) and this, by driving the connecting rod (10) causes the pendulum (o) to vibrate to and fro, carrying with it the connecting rod (24) back and forth with the bed to which it is attached. The rack (f) on the side of the bed and forming part thereof and of course moving with it, gives motion to all parts of the machine. The wheel (h), which is geared directly into the rack, carries the cylinder (when the bed is passing under it with the sheet to be printed) just equal to one revolution of the crank or, in case a pendulum is used, just equal to the vibrating distance of the pendulum which must be, in all cases just equal to the circumference of the cylinder. The loose wheel (h), reversing its motion as the bed is brought back under the inking rollers, leaves, by the nonoperation of the pawl (70) upon the clutch (j), the cylinder at rest. The next revolution of the crank, carries the cylinder with the loose wheel, by the operation of the pawl upon the clutch, and thus the cylinder is in a state of rest and motion alternately.

One half of the cylinder (more or less) is used for giving the impression, and a portion of the remaining part is reduced in size so as to allow the types on the bed to pass freely under it.

A geared wheel (1") is placed on the vibrating distributing roller which drives the same and this carries the rest of the rolls by traction. This wheel is connected with the rack (f) by an intermediate pinion. Another geared wheel (2) is also so arranged as to work in the tooth wheel (h) and drive the rollers and tapes which draw the sheet over the fly. Motion is given to the fly by a cam on the cylinder shaft, and to the registering apparatus by a cam on the end of the cylinder. These are not new and produce no new effect.

The sheet being properly laid on the feed board, is taken by the cylinder through the operation of common grippers and carried down to the form by the revolution of the cylinders and thrown out on the opposite or back side of the cylinder, on to tapes forming an apron over the fly, which throws it over on to the board.

The form gets its ink by passing under and coming in contact with, the inking rollers on its motion backward and forward.

Remarks-The arrangement descrlbed simplifies and cheapens the cylinder printing press in its construction, without materially diminishing its speed in working. It

requires less power to operate it, from its having less parts and consequently less friction; as well as from the direct application of power to the several parts without intermediary parts to take up power.

A serious evil in the common cylinder press has been the concussion given at each reversal of the bed at opposite ends of the press. For the purpose of preventing concussions, springs of various constructions have been used as checks to the continuous motion produced by the variable rack and pinion.

For the purpose of preventing concussion and jar, the crank motion for driving a cylinder printing press has been introduced by methe crank producing the very motionnecessary for such purposethat is, a slow motion of the bed at each extreme of its travel, accelerating as it nears the center and diminishing as it approaches the termination of its course. By this variable motion, produced by the crank, the bed is gradually started and stopped and gently guided over the center at each reversal of the bed without causing concussion or jar such as is found to take place in the common cylinder press.

Having thus fully described the construc tion and operation of my improved press, what I claim as my invention and desire to secure by Letters Patent, is

1. Such a combination and arrangement of a horizontal bed and cylinder of a printing press as will enable each forward movement'of the bed to impart a revolution to the cylinder for the purpose of taking or giving an impression and permit it to remain stationary during the reverse movement of the bed substantially as herein described.

2. I claim in combination with a horizontal cylinder moving in one direction with alternate rest and motion the inking and flying apparatus substantially as described.

JOEL G. NORTHRUP.

Witnesses:

THos. B. Frrorr, WILLIAM S. HUNTINGTON. 

